DE3370737D1 - Subscriber circuit for a telephone network - Google Patents

Subscriber circuit for a telephone network

Info

Publication number
DE3370737D1
DE3370737D1 DE8383201608T DE3370737T DE3370737D1 DE 3370737 D1 DE3370737 D1 DE 3370737D1 DE 8383201608 T DE8383201608 T DE 8383201608T DE 3370737 T DE3370737 T DE 3370737T DE 3370737 D1 DE3370737 D1 DE 3370737D1
Authority
DE
Germany
Prior art keywords
telephone network
subscriber circuit
subscriber
circuit
telephone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8383201608T
Other languages
German (de)
Inventor
Aloysius Jozef Nijman
Franciscus Adrianus C Schoofs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3370737D1 publication Critical patent/DE3370737D1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
DE8383201608T 1982-11-12 1983-11-10 Subscriber circuit for a telephone network Expired DE3370737D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8204377A NL8204377A (en) 1982-11-12 1982-11-12 SUBSCRIPTION CIRCUIT FOR A TELEPHONE NETWORK.

Publications (1)

Publication Number Publication Date
DE3370737D1 true DE3370737D1 (en) 1987-05-07

Family

ID=19840578

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383201608T Expired DE3370737D1 (en) 1982-11-12 1983-11-10 Subscriber circuit for a telephone network

Country Status (8)

Country Link
US (1) US4608461A (en)
EP (1) EP0109705B1 (en)
JP (1) JPS59101955A (en)
AU (1) AU563742B2 (en)
CA (1) CA1206648A (en)
DE (1) DE3370737D1 (en)
DK (1) DK512583A (en)
NL (1) NL8204377A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551670A (en) * 1984-04-19 1985-11-05 At&T Bell Laboratories Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level
US4679232A (en) * 1985-08-02 1987-07-07 American Telephone And Telegraph Company, At&T Bell Laboratories Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed
US7869179B2 (en) * 2007-03-14 2011-01-11 Panduit Corp. Protection patch panel

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223781A (en) * 1962-02-13 1965-12-14 Itt Constant voltage device
FR2254168A1 (en) * 1973-12-11 1975-07-04 Ass Ouvriers Instr Precision Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.
FR2315811A1 (en) * 1975-06-27 1977-01-21 Labo Cent Telecommunicat ELECTRONIC DIPOLE FOR LOOPING A TELEPHONE LINE
GB1563802A (en) * 1975-11-10 1980-04-02 Post Office Electronic current feed circuit
FR2373927A1 (en) * 1976-12-10 1978-07-07 Trt Telecom Radio Electr ELECTRICAL NETWORK INTENDED TO BE INSERTED BY A PAIR OF TERMINALS IN A TELEPHONE SUBSCRIBER LOOP
FR2382810A1 (en) * 1977-03-02 1978-09-29 Labo Cent Telecommunicat TELEPHONE LINE POWER CIRCUIT WITH PROTECTION
FR2403690A1 (en) * 1977-09-14 1979-04-13 Labo Cent Telecommunicat Active dipole gyrator for telephone line - uses transistor with base coupled to output of operational amplifier
US4272656A (en) * 1979-04-05 1981-06-09 Precision Monolithics, Inc. Quasi-resistive battery feed for telephone circuits
NL7903662A (en) * 1979-05-10 1980-11-12 Philips Nv LINE CIRCUIT.
NL7904159A (en) * 1979-05-28 1980-12-02 Philips Nv DEVICE FOR SUPPLYING SIGNALS TO A TELEPHONE LINE.
US4476351A (en) * 1982-03-25 1984-10-09 Rockwell International Corporation Subscriber loop current regulator
US4440979A (en) * 1982-05-03 1984-04-03 Gte Automatic Electric Incorporated Current sink for DPT channel unit
US4511763A (en) * 1982-11-01 1985-04-16 Gte Communication Systems Corporation Floating dc current source for a subscriber loop circuit

Also Published As

Publication number Publication date
EP0109705A1 (en) 1984-05-30
DK512583A (en) 1984-05-13
EP0109705B1 (en) 1987-04-01
JPS59101955A (en) 1984-06-12
CA1206648A (en) 1986-06-24
NL8204377A (en) 1984-06-01
DK512583D0 (en) 1983-11-09
AU2114483A (en) 1984-05-17
US4608461A (en) 1986-08-26
AU563742B2 (en) 1987-07-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee